11.7 Configuring a Provider-Assigned IPv4 Address

CCNP RS 300-101, Establishing Internet Connectivity, Uncategorized

The ISP will either provide a static address or dynamic address that must be acquired through use of DHCP. If you’re hosting web services, a dynamic address likely won’t work since the 1:1 NAT parameters or DNS would inevitably change (though there are mechanisms which could circumvent this issue, like DDNS).

Steps to configure:

  1. Enable IP Routing on the router. You’ll need it to set the default static route.
  2. Add the IPv4 address and netmask to the interface.
  3. No shut the interface
  4. Configure the default route to the next-hop address provided by the ISP.
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